Centrifugal pump.



- UMTEDSTATES PATENT oFFiCE. e

` FEiiii'iIivrAiiiiV W. itnotiii AND CARL A. KROGH, or sAiv rRANcisco, CALIFORNIA.

To all 'whom 'itk 'may concerns; .l Be itjknoivn thatfrwe, rFERDINAND W.

` Kroon andr CARL. A. Kiiocinboth citizens of i :the United States,` and residents 'of San` Francisco, iii the county of San Francisco,

State of California, have invented new and useful Improvements in Centrifugal'lumps; and we do hereby declare that the following is a. ll, clear.` and exact. description. of said invention, such as will enable others skilled in the art to'which it most nearly appertains to make, use, and practice the saine.

4Our invention" relates particularlyto pur-aps constructed with` incased `.i-heels or iipellers-having either a horizontal or ver'k tical position as the case may be, but for l t i' 20 ica pumps the purpose of this application we have illustrated` our improvements as The main object of our invention isft'o provide automatic means to equalize the iineven pressure which arises from various sources against`tlie running parts, and avoid the friction and at the sa'ne time lubricate their bearing faces while in operation.

To these ends our invention consists in the construction and arrangement of the various parts cooperating to obtain the desired result as will be gully described hereinafter .and pointed vout in the claims.

Referring to the herewith annexed drawings, consisting of four sheets, which forni aart of this Specification andl in which- .igiire-` 1 is a vertical section through an ordina-ry pump provided with oiirautoiiiatic 'equaliziiigand lubricatingdevice.: Fig. 2 is an enlarged vertical section of our auto- .inatic equalizing and lubricating device with a brokenk portion of the pump casu-ig. Figs. 3 and 4 are vertical sections sli-owing various modifications. inthe arrangement of Vour automatic equalizing and lubricating d evicc.

Like letters of reference made use of in the several figures indicating like' parts 4s. f f Y whenever employed."

The pump or main casing A rprovided with the double suction inlets B- and central passage C, the' base D vupon which the casing'vi's mounted., the iinpeller E inclosed within the casing and the driving shaft F with which the viinpeller rotates constitute .the principal parts of a centrifugalv pump to which our improvements are ap plicable. y

Projectingr outwai-dly-above the casing iii a line with the central passage C is a piston i fr' Specication t Letters Patent. Application tiled. Nove'mbei` 27, 19ll3 Serial Nol 182,820.

applied to ver- PatentedV oet. 4', 1910i raising! or cyliiiderthrough whichl tliedriv ing shaft passes and as shown in F lgs. l and 2 this piston casingl or 'cylinder is formed in two 'sections vin-the lower section (l and the 'upper section ll which are divided by the partition I boltedA between' the outward i projectingal annular flanges a and L of the sections :mdadapted to hermctically seal each section against communication with the other. .This method of constructing and fastening Athe cylinder permits the various parts` placed therein to be most conveniently assembled and disassembled. The lower section (il-is provided with a vacuum chamber J the diameter ot which is equal in area to the central passa-ge C.v lhe end of this.

chamber J toward the suctioninlet is wholly ,open and in communication with said inlets.

'and'inounted'iii said chamber is a piston K which is thus exposed to suction from said rinlets.- This piston is fixed on the driving shaft l" and is"1ilaccd`iieai the closed end of such chamber, in such position, however, as

to leave a small space between its top sur- -face and the wall ot' the closedl end of the vacuum chain-bci'. It .will be observed that theconstruction described' causes the pres-l sure imposed on the inipcller through thesuction inlets to be counteracted by the suctional force acting on the piston in a direc'- tion opposite that ot' said pressure, thus. balancing saidy iinpel'ler'as far as the suction isconcerned. The sp'acc in the vacuum chamber J located behind said pistou K isv provided with a valvll 01* 060k U (S0.O Flill 2) leading. to the outer air, and which may sircd, an air cushion when the piston moves y upward or a vacuum when the same. moves downward. The upper section H' of the cylinder is also provided with a chamber iu bearings are provided with the'usual stalling I bo'xes as shown in the drawings for adpisting properly the driving. shaft and inake tight joints. The central lower part of the casing is provided with the us'ual Journal lie operated. to croute in said Space, if ilo- 971,84e 'A 'l f; j f;

y nected parts,"`the rising' movement of" said fsha-ft. will open the valve and admitadditional pressure onthe pistony L until the shaft and its said connected parts. 'have returned toY their' normal',positions.V '.In'the'` form shown in Fig. 4,-the connecting pipe h and valve. k lofthe formv shown in Figs. 1

` `and 2 are dispensed with, andthe valvei (17?) is operated in the iii-:inner aiidt'orfthe purpose set forth .in the, .foregoing descri tion with reference to .the corresponding va re 2'.

This arrangement is particularly intended tocoiiiiterbalance the' weight of thedriving shaft and machinery which may be connected thereon and .have in some cases a tendentv to force down the inipcller.

lt will bei'eadilyseen that bythe above described. `construction and arrangement the mieren pressure from the suction inlets or` beneath the impell'er is-fully counteracted and the running parts kept -in steadyv position withouty the usual collars secured to the driving shaft for that. purpose as heretofore land.

Haring' tlius describedvr same what we claim as new and desire to secure by U. S.

LettersPatent-is- K l v 1. A centrifugal pump `haviiig,"in combination,` an iinpeller and means .for maintainling the im peller in a predetermined position, said means comprising a chamber. :i head which is mounted in the chamber and partalies of the-movement of the impeller andl is subject to the pressure of liquid in the. chamber. a val red ypipe foins-applying the chainber'with liquid under pressure to act kupon the head. and means whereby the valve of said `pipe is automaticallyopenedand closed by variations in the position of the impeller'from its predetermined position to thereby restore itto such position, compris-kr ing a valve-operating lever connected with the shaft and operated therebytoadmit or cut-ofiy the supply of vliquid to the chamber.

l centrifugal pump.comprising an iinpellet. a driving shaft connected uith said i-inpellei". a piston coiiiiected-witli said shaft, a casing for-said piston. valved fluid-supplyr means connected with said casing and connecting devices between the valve of said,

fluid supply means and saidshaft whereby pi'essureoir said pistou is` automatically regulated. saidV connecting devices compris- .ing van oscillatory lever actuated by' said shaft, and a. connecting rod between said lever and valve... Y

3. A centrifugal pump.' liavingin ycombination with its casi-ng. iinpeller aiid inipeller-shiaft: means for automaticallyA Vmaintaining the impe-ller in predetermined posiing pipe arranged'- outside tlie ycasing and connected with the chamber. a valve in said pipe for controllingz the flow of Huid therethrough. means in .said chamber. partaking tion. comprising a chamber.' a Huid-conduct its proper-position tofopcii and .close the valve.1

4. A centrifugal pump,y having combi'- 75 s, .nation with its casing, impeller and impeller-shaft; means for automatically maintaining the impeller in predetermined posi-l tion, comprising a lchamber, a ,flind;condiicting pipe arrangedy outside the casing and connected with the chamber, a valve in said pipe for controlling the fioivfof fluid therethrough, means. in said chamber, partakiiig of movement k,of the impeller and upon which the fluid acts to maintain theimpeller l, l 'Y in its predetermined position, and meansfor opening and 'closing the valve by movementsV of shaft from and toward its proper position, comprising jointed leversconnecting the Acentrifugal pump, having in combination with its,- casing, impeller and impeller-shaft'; means for automatically maintaining the impeller in predetermined posi- 1 y' er, a fluid-conducty,

tion, comprising a cham ing pipe arranged outside the casing and connected with the chamber, a valve'in said pipe for controllingthe flow of fluid tlierey -r throughmeans in said chambenpartaking of movement of the impellcr and -upon r which the fluid acts to maintain the iinpellei' in its predetermined position, and means for opening and closing the Vvalve bv movements of kthe shaft from and towar its` properl position, comprising an -oscillatory lever r 'l connectedk with theshaft, and a link connected withl saidlever vand with the valvel 6. 'A centrifugalpump, having in combination with itsY casing,V impeller and iin-v 'peller shaft: means for automaticallyy main- 110 vtaining the impeller in predetermined posi- `tion.comprising a chamberl encircling the shaft, means mounted in the chamber and e pai'takmg of movements of the impeller and w'itliin'tlie chamber, a plurality of fluid `coiiducting pipes having 'connection with thecliamber andfwith source of supply of fluid underpressure, valves in said pipes, and Y ing an oscilatoryV lever havingv connection withl the shaft `and the valves.

7. A centrifugaly pump having,in-combi i nation with its casing, impeller and iinpellei`sliaft:venieansfor automatically main- 125 taining the. iinpeller in predetermined posi- -tion.`comprising a chamber `encircling the shaft. a head mounted' onthe shaft and in the chamber. pipes having communication ladapted to receive the effect of fluid pressures van operatinfr means for the valves compriswith a source of fluid supply and entering 13 said chamber at opposite sides of thehead.v valves V1n said pipes, fand/means'forsetuat -ing said valves-by movements of the shaft from or toward its proper position, having,r

'piston mounted in said casingand' uponY the lastA mentionedv casing vabove Aand belowv an oscillatory lever connected wit-h'the shaft and connections -hetween seid lever and sures on saidiiupeller, said balancing means comprising acasing encircling said shuttle' said shaft, pipes having.y communication withk a source ofliquid supply and entering said piston and through which liquid is admitted to said casing to act upon said piston and produce `the balance which maintains said impeller andy shaft in their predetermined positions, valves in said vpipes for 'i so' cutting olf the supply through the sainedun' 'ing the normal operation oflthe inipeler, and operating Adevices by which sz'iidvalvesl are opened and closed. independently kof each other. 'for Vthe purpose described, under the 'control of movement-of said impellerk f from and to its predetermined positiomsaid operating. devices-comprising an oscillatory lever actuated by said shaft end connect-ing means between said lever and valves. Y

9. A centriugal'pump, comprising ay main easing having suction inlets'. an im 'ellei-a driving. shaft carrying said impe] er, and

i means for balancing; 'the suctional forces and pressures to which said impeller is-su`b V"jected in operatioincomprising a'piston on said shaft, means through which said piston' is, exposed to suctionl opposed :to thatfon the `'impelleig a second piston and means for im; Vpos1n', pressure on said second piston -i'o ceunterbalance-the pressure on the impeller,y

in'g on said impeller. a liquid-containing casing in which the other of said pistons is. arranged. and means for controlling the supplyofliquid to said* casing to actron the said means comprising Vdepiston therein, U

` suppliy of liquid is -cut vices which me ofi when the pressures are counterbalanced.

1].. A centrifugaL pump con'iprisirigslas main casing, an' lmpeller and its driving shaft rotatably mounted therein, a cylinder centrifugal pump comprising a eas-A ing, an impeller mounted therein` a 'driving shaft connected with said impeller, and .deans for automatically balancing the pres-` encircling said shaft'and having non-com? the creat-ion' of a vacuum therein, a piston mounted on said shaft. within the vacuum chamber, a-second piston secured to. said shaft andv mounted in the otherfof said chambers, and means for supplying fluid to the latter chamber.v

v 12. In a centrifugal pumpT provided with a easing, an iinpeller Within said casing, a driving;r shaft iournaledupon said casing and connected to the. impeller, a cylinder mounted upon said casing around the driving shaft andv having a' chamber 'formed there-in. a :piston secured to said shaft Within said chamber, in combination with kmeans to .municating chambers one of which is open r to the. suction vinlets of said main casing for balance said piston 'consisting of a liquid;

inunicating with' said chamber. valves sccuredfto said pipes provided Ywith automatic device provided -with carrying pipes com-f means to open and .close saidi-'alvcs consistin;l ofconnect-ing` rod N( securedy to said valves, lever 7 rmounted upon standard O and connected to the driving shaft, substantiall;v as yset forthV and for specified.

f' so i the purpose` i Y 13. In acentii'fiigal pump,- provided with a easing, an' impeller Within said easing, a.

*driving shaft journaled upon said casing and connected to the impeller, a. cylinder mounted upon-said casing around the driv- Y ing shaft and having chamber formed there-` in, a piston secured to said shaft Within the chamber. in combination with ,means to balance said piston consisting; of liquid circu` 1 latinglf in said chamber and Va eonihinedautomatie carrying and regulatingr device Qom- `municating with said chamberk for saidk liquid. rconsistiugo'f supply pipe M, connectvv'ing pipe z, valve 7c, connecting rod N, lever VZ mounted-upon. standard Ok and pivoted to the connecting' rod and the dr: 'ingr shaft substantially 'as set forthv and for the pui pose specified.

14. ln a centrifugal pump, provided with a casing. an impeller rotating' Within vsaid casing. a driving shatt iournaled upon said casing and connected to the impeller, a cylinder mounted upon saideasing around the drivingv shaft and having chamber formedv thereiina pistoneecured to said shaft within the chamber. in combination with means to balance said pistou' consistingr ofliquid circulating in said chamber and an automatic carrying; and regulating' device com;

`inunicatiug with' said' chamber for said liquid consisting of supply pipe M connecting; pipes g and 71- valves and L* se, l

cured to said connecting; pipes, lever Z mounted upon'standard O and pivoted to ythe driving shaft, connectingr rod N secured to the lever and the valves z and-7s substantially as set forth and for l the purpose specified.

ilo

`15. A centrifugal pump comprising a main casing, an inipeller and its drivingr shaft rotatably mounted therein, Va piston casing encircling said shaft, a piston.

inouiiteivdz-in saidvpiston casing and `secured to saidl'shaft, a valved liquid supply pipe ing and extending a distance above the samsq and means connecting the valve of said pipe with said shaft ior operating .the saine auto matically.

16. A centrifugal pump having, in combif nation, an iinpellcr and means for maintainlng the inipelleif nia predetermined position, said means comprising a chamber, aj,

' head which is mounted in the chamber and a pipe which extends from afplace at a distance. above the chamber, and valve-operat-V ing connections between said valve and the shaft of the impeller. 17. A centrifugal pump having, incombi nation. an nipeller and means for maintain` ing the impeller in ya predetermined positiou, said means comprising a chamber, a

head which is mounted in the chamber and f partakes of movement of the lmpeller, and

means for supplying the chamber with liquid under pressure. to act; upon the head,

, including a stand pipe extending from a distance above the chamber, connections leading. from the stand pipe to portionsof the chamber at opposite sides of the. head, and valvular ine-ans for controlling the `flowl through said. connections having operating elements the action of which is cont-rolled by changesin the position of the impelle'i' nation, a main casing, an iinpcller mounted in the casing and having a shaft., a chamber into which said v shaft extends, a head mounted in the chamber and upon said shaft,

a stand-pipe extending from adistance above the chain-ber, pipes leading from the stand pipe into the chamber atopposite sides ofv said head, valves in said pipes, and valvehaving eoimn-unication Wit-h said piston cas- Y the closed endl of` the'chamber, su

yas set forth and for the purposes specified.

operating means connected 'with nml opel*v fated' byV the impeller sbaftfand adapted 1.o .operate the `valves independently of each. ,-other. n Y Y 719. centrifugal. pump,fcomprisingv an iinpeller andv itsdriving sli-afan casing havy u ing suctioninlets and a passage leading '.f

from saidr inlets totheiinpeller, said casing also having a vacuum chamber one end o f 'y ivhicli'is closed and the other end ofwhich is Wholly open and of approximately the same diameter asethatl ofsaid passage and' having communication with said passageavf and la ,piston secured to said driving shaft,y and located in said vacuum chamber, -substantially as set forth and for the. purposes specified.

20. In a centrifugal pump, provided with. a casing, an inipellei' having a driving shaft aknd'rotatiiig `ivithinthe casing, suction inlets secured to said casing, a vacuum chainber formed around-the driving shaft and having closed andopened ends, a piston placed within said-chamber, in combination with aV n v n '75 j l stantially relief valve securedl between the piston and 21. A centrifugal pump comprising a main main casing having suction inlets and a vacuum chamber, said vacunmchainber havinga closed and an open end, a piston casf ing, an inipeller and its driving shaftl said shaft extending through said vacuum chamber and piston casing, a piston secured to said shaft and arranged in said vacuum' chamber, arelief valve between said pistonV and the closed end of said vacuun chamber,

t0n casing, f a

i u i f- In testimony whereof we haveailixed our iiwal ium) havinnr in combi-v` n l Y I Y. 18 Lentuf bi l l c ,signatures inthe presence of two; ivltnesse l"this 10th lday of October, D. 1903.

a second piston mounted in said pist-on casying and secured to saidshaft', and means for conducting liquid under pressure to said. pis- 90' FERMAND iv. Kiiooii CARL A. KROGH.

In presence o-" J. ConiNsoN, A JOHN EGHTL'ER. 

